BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  how to stop a work in progres?          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Andrea Guest Posted: Thu Mar 04, 2004 6:57 pm    Post subject: how to stop a work in progres? Hi! If I am downloading a long message with attachments with tidpop3.retrieve, what can be a solution to permit the user to stop the work in progres if eh changes his mind about downloading it? Thanks Andrea Back to top Chad Z. Hower aka Kudzu Guest Posted: Thu Mar 04, 2004 7:38 pm    Post subject: Re: how to stop a work in progres? "Andrea" <andrearo (AT) tin (DOT) it> wrote in news:40477c2a (AT) newsgroups (DOT) borland.com: Quote: If I am downloading a long message with attachments with tidpop3.retrieve, what can be a solution to permit the user to stop the work in progres if eh changes his mind about downloading it? Close the socket from another thread, or use an Antifreeze and close it from an event. -- Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/ "Programming is an art form that fights back" Want more Indy stuff? Try the Atozed Indy Portal at http://www.atozedsoftware.com/ * More Free Demos * Free Articles * Extra Support Back to top Admiral Jake Guest Posted: Thu Mar 04, 2004 11:33 pm    Post subject: Re: how to stop a work in progres? "Chad Z. Hower aka Kudzu" <cpub (AT) hower (DOT) org> wrote Quote: Close the socket from another thread How does one do this is a truly threadsafe manner? My experience with multithreading is that if you access any resource from multiple threads it had better be threadsafe or protected by a synchronization object like a TCriticalSection, or all heck is going to break loose in an annoyingly irreproducible manner. How do you suggest that references to an Indy object be passed between threads so that one thread can be interrupted by a line like this: IdNNTP1.Disconnect; from another thread? The reason I ask this is because I need to provide a graceful way for users to cut short long or stalled activties, and I can't put off this functionality any more, being in early beta now and only months away from release. Back to top Andrea Guest Posted: Thu Mar 04, 2004 11:34 pm    Post subject: Re: how to stop a work in progres? Ok, close it from another event... can you suggest me how to close it? Thanks Andrea "Chad Z. Hower aka Kudzu" <cpub (AT) hower (DOT) org> ha scritto nel messaggio news:Xns94A2DC3698E8Fcpub (AT) 127 (DOT) 0.0.1... Quote: "Andrea" <andrearo (AT) tin (DOT) it> wrote in news:40477c2a (AT) newsgroups (DOT) borland.com: If I am downloading a long message with attachments with tidpop3.retrieve, what can be a solution to permit the user to stop the work in progres if eh changes his mind about downloading it? Close the socket from another thread, or use an Antifreeze and close it from an event. -- Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/ "Programming is an art form that fights back" Want more Indy stuff? Try the Atozed Indy Portal at http://www.atozedsoftware.com/ * More Free Demos * Free Articles * Extra Support Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 05, 2004 12:37 am    Post subject: Re: how to stop a work in progres? "Admiral Jake" <johnjac76[nospam]@comcast.net> wrote Quote: How does one do this is a truly threadsafe manner? When closing the socket, call DisconnectSocket() instead of Disconnect() so that no existing objects are freed. Disconnect() frees the IOHandler, whereas DisconnectSocket() does not. Quote: How do you suggest that references to an Indy object be passed between threads so that one thread can be interrupted by a line like this: Sockets themselves are thread-safe internally. It is safe to close a socket from one thread while another thread is still using the socket. The operational thread will simply fail its current operation with an error that the socket is no longer valid. Gambit Back to top M. Utku ALTINKAYA Guest Posted: Fri Mar 05, 2004 8:52 am    Post subject: Re: how to stop a work in progres? Ita not a alternative to closing socket bu maybe you can throw an exception onwork event also. And catch it in execute method of your thread... 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